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ch. 20 earth science
| Question | Answer |
|---|---|
| one way thunderstorms are produced | by a single cumulonimbus cloud |
| number of thunderstorms on earth at any given time | 2000 |
| thunderstorms form when ____ humid air rises in a unstable envirement | warm |
| thunderstorms dont form when ____ humid air rises in a unstable envirement | cold |
| During the ____ stage strong updrapts, or upward movements of air, supply moist air | cumulus |
| The ____ stage begins at this point in the development of the thunderstorm,the amount and size of the precipitation is too great for the updrafts to support | mature |
| The final stage is called the ____ stage | dissipating |
| Tornadoes are violent windstorms that take the form of a rotating column of air called a ____ | vortex |
| What're most tornadoes associated with? | Severe thunder storms |
| a ___ is a vertical cylinder of rotating air that develops in the updraft of a thunderstorm | mesocyclone |
| how strong does the winds have to be to be a hurricane | 119 kph |
| where do most hurricanes develop? | between about 5 and 20 degrees north and south latitude |
| when do most hurricanes develop? | most often in the summer |
| The ______ is the doughnut shaped area of intense cumulonimbus development and very strong winds that surrounds the eye of a hurricane | eye wall |
| what is the eye of a hurricane | a zone where precipitation ceases and wind subsides |
| A ____ is a dome of water about 65 to 80 kilometers wide that sweeps across the coast where a hurricane's eye moves onto land | storm surge |
| how strong are the winds of a F4 in a tornado | 333-419 kph |
| how strong are the winds of a F5 in a tornado | > 419 kph |
| how strong are the winds of a category 4 hurricane | 210-249 kph |
| how strong are the winds of a category 5 hurricane | > 249 kph |
| when two air masses meet, they form a ____ | front |
| when do warm fronts form | when warm air moves into an area formerly covered by cooler air |
| how is a warm front shown on a weather map | its shown by a red line with red semicircles that point toward the cooler air |
| when cold fronts form | when cold dense air moves into a region occupied by warmer air |
| how is a cold front shown on a weather map | shown by a blue line edged with blue triangles that point toward the warmer air masses |
| whendo stationary fronts form | the surface position of the front DOES NOT MOVE |
| when do occulated fronts form | when a cold front overtakes a warm front |
| mid-latitude cyclones spin _____ | counterclockwise |
| mid-latitude cyclones dont spin _____ | clockwise |
| a ____ is an immense body of air that is characterized by similar temperatures and amounts of moisture at any given altitude | air mass |
| __________ are uniformly cold and dry in winter and cool and dry in summer | continental polar air masses |
| ______ are warm, loaded with moisture, and usually unstable | Maritime Tropical air masses |
Created by:
csuddarth